-
Notifications
You must be signed in to change notification settings - Fork 39
/
main.go
226 lines (201 loc) · 7.2 KB
/
main.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
package main
import (
"flag"
"fmt"
"github.com/utrack/clay/v3/cmd/protoc-gen-goclay/third-party/grpc-gateway/internals/codegenerator"
"io"
"io/ioutil"
"os"
"strings"
"github.com/golang/glog"
"github.com/utrack/clay/v3/cmd/protoc-gen-goclay/genhandler"
"github.com/utrack/clay/v3/cmd/protoc-gen-goclay/third-party/grpc-gateway/internals/descriptor"
"google.golang.org/protobuf/proto"
plugin "google.golang.org/protobuf/types/pluginpb"
)
var (
importPrefix = flag.String("import_prefix", "", "prefix to be added to go package paths for imported proto files")
file = flag.String("file", "-", "where to load data from")
allowDeleteBody = flag.Bool("allow_delete_body", false, "unless set, HTTP DELETE methods may not have a body")
grpcAPIConfiguration = flag.String("grpc_api_configuration", "", "path to gRPC API Configuration in YAML format")
withImpl = flag.Bool("impl", false, "generate simple implementations for proto Services. Implementation will not be generated if it already exists. See also `force` option")
withSwagger = flag.Bool("swagger", true, "generate swagger.json")
withSwaggerPath = flag.String("swagger_path", "", "in addition to swagger in pb.goclay.go, generate separate swagger file at provided path")
applyHTTPMiddlewares = flag.Bool("http_middlewares", true, "apply default HTTP millewares")
implPath = flag.String("impl_path", "", "path where the implementation is generated (for impl = true)")
forceImpl = flag.Bool("force", false, "force regenerate implementation if it already exists (for impl = true)")
serviceSubDir = flag.Bool("impl_service_sub_dir", false, "generate implementation for each service into sub directory")
implTypeNameTmpl = flag.String("impl_type_name_tmpl", "{{ .ServiceName}}Implementation", "template for generating name of implementation structure")
implFileNameTmpl = flag.String("impl_file_name_tmpl", "{{ if .MethodName }}{{ .MethodName }}{{ else }}{{ .ServiceName }}{{ end }}", "template for generating implementations filename")
withTests = flag.Bool("tests", true, "generate simple unit tests for proto Services")
pathsParam = flag.String("paths", "", "if you want to use source_relative instead of import which is default (see google.golang.org/protobuf@v1.27.1/compiler/protogen/protogen.go:177 for more details)")
)
func main() {
flag.Parse()
flag.Lookup("logtostderr").Value.Set("true")
defer glog.Flush()
// for debugging, set it to something like 5
flag.Lookup("v").Value.Set("0")
reg := descriptor.NewRegistry()
glog.V(2).Info("Processing code generator request")
fs := os.Stdin
if *file != "-" {
var err error
fs, err = os.Open(*file)
if err != nil {
glog.Fatal(err)
}
}
glog.V(2).Info("Parsing code generator request")
req, err := parseRequest(fs)
if err != nil {
glog.Fatal(err)
}
pkgMap := make(map[string]string)
if req.Parameter != nil {
err = parseReqParam(req.GetParameter(), flag.CommandLine, pkgMap)
if err != nil {
glog.Fatalf("Error parsing flags: %v", err)
}
}
// Remove this type cast when grpc-gateway will release new version.
// For now this functions only present in master branch
var xreg interface{} = reg
if set, ok := xreg.(interface{ SetAllowRepeatedFieldsInBody(bool) }); ok {
set.SetAllowRepeatedFieldsInBody(true)
}
// Use Field.GetJsonName() for generating swagger definitions
if set, ok := xreg.(interface{ SetUseJSONNamesForFields(bool) }); ok {
set.SetUseJSONNamesForFields(true)
}
reg.SetAllowDeleteBody(*allowDeleteBody)
reg.SetPrefix(*importPrefix)
reg.SetDisableDefaultErrors(true)
for k, v := range pkgMap {
reg.AddPkgMap(k, v)
}
if *grpcAPIConfiguration != "" {
if err = reg.LoadGrpcAPIServiceFromYAML(*grpcAPIConfiguration); err != nil {
emitError(err)
return
}
}
if err = reg.Load(req); err != nil {
emitError(err)
return
}
genhandler.MustRegisterImplTypeNameTemplate(*implTypeNameTmpl)
genhandler.MustRegisterImplFileNameTemplate(*implFileNameTmpl)
opts := []genhandler.Option{
genhandler.Impl(*withImpl),
genhandler.ImplPath(*implPath),
genhandler.Force(*forceImpl),
genhandler.ServiceSubDir(*serviceSubDir),
genhandler.ApplyDefaultMiddlewares(*applyHTTPMiddlewares),
genhandler.WithTests(*withTests),
}
if *withSwagger {
swagBuf, err := genSwaggerDef(reg, req)
if err != nil {
emitError(err)
return
}
opts = append(opts, genhandler.SwaggerDef(swagBuf))
}
if *pathsParam != "" {
switch *pathsParam {
case genhandler.PathsParamTypeImport:
case genhandler.PathsParamTypeSourceRelative:
opts = append(opts, genhandler.PathsType(*pathsParam))
default:
emitError(fmt.Errorf("unexpected value for paths option: %q, expected one of `import`, `source_relative`", *pathsParam))
}
}
if *withSwaggerPath != "" {
opts = append(opts, genhandler.SwaggerPath(*withSwaggerPath))
}
g := genhandler.New(reg, opts...)
var targets []*descriptor.File
for _, target := range req.FileToGenerate {
var f *descriptor.File
f, err = reg.LookupFile(target)
if err != nil {
glog.Fatal(err)
}
targets = append(targets, f)
}
out, err := g.Generate(targets)
glog.V(2).Info("Processed code generator request")
if err != nil {
emitError(err)
return
}
emitFiles(os.Stdout, out)
}
// parseReqParam parses a CodeGeneratorRequest parameter and adds the
// extracted values to the given FlagSet and pkgMap. Returns a non-nil
// error if setting a flag failed.
func parseReqParam(param string, f *flag.FlagSet, pkgMap map[string]string) error {
if param == "" {
return nil
}
for _, p := range strings.Split(param, ",") {
spec := strings.SplitN(p, "=", 2)
if len(spec) == 1 {
if spec[0] == "allow_delete_body" {
err := f.Set(spec[0], "true")
if err != nil {
return fmt.Errorf("Cannot set flag %s: %v", p, err)
}
continue
}
err := f.Set(spec[0], "")
if err != nil {
return fmt.Errorf("Cannot set flag %s: %v", p, err)
}
continue
}
name, value := spec[0], spec[1]
if strings.HasPrefix(name, "M") {
pkgMap[name[1:]] = value
continue
}
if err := f.Set(name, value); err != nil {
return fmt.Errorf("Cannot set flag %s: %v", p, err)
}
}
*implPath = strings.Trim(*implPath, "/")
if *implPath == "." {
*implPath = ""
}
return nil
}
func emitFiles(w io.Writer, out []*plugin.CodeGeneratorResponse_File) {
responseFile := &plugin.CodeGeneratorResponse{File: out}
codegenerator.SetSupportedFeaturesOnCodeGeneratorResponse(responseFile)
emitResp(w, responseFile)
}
func emitError(err error) {
emitResp(os.Stdout, &plugin.CodeGeneratorResponse{Error: proto.String(err.Error())})
}
func emitResp(out io.Writer, resp *plugin.CodeGeneratorResponse) {
buf, err := proto.Marshal(resp)
if err != nil {
glog.Fatal(err)
}
if _, err := out.Write(buf); err != nil {
glog.Fatal(err)
}
}
// extracted from grpc-gateway pre-1.13.0
func parseRequest(r io.Reader) (*plugin.CodeGeneratorRequest, error) {
input, err := ioutil.ReadAll(r)
if err != nil {
return nil, fmt.Errorf("failed to read code generator request: %v", err)
}
req := new(plugin.CodeGeneratorRequest)
if err = proto.Unmarshal(input, req); err != nil {
return nil, fmt.Errorf("failed to unmarshal code generator request: %v", err)
}
return req, nil
}